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| author | Nitin Gupta <nitin.m.gupta@oracle.com> | 2017-02-01 16:16:36 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-02-23 08:30:28 -0800 |
| commit | c7d9f77d33a779ad582d8b2284ba007931ebd894 (patch) | |
| tree | d6a8de21e9a42c25a883e98f96935c1d52456053 /arch/sparc/include/asm/page_64.h | |
| parent | 0d88b86694e0b176c1b9ca10cee95863065e2471 (diff) | |
| download | lwn-c7d9f77d33a779ad582d8b2284ba007931ebd894.tar.gz lwn-c7d9f77d33a779ad582d8b2284ba007931ebd894.zip | |
sparc64: Multi-page size support
Add support for using multiple hugepage sizes simultaneously
on mainline. Currently, support for 256M has been added which
can be used along with 8M pages.
Page tables are set like this (e.g. for 256M page):
VA + (8M * x) -> PA + (8M * x) (sz bit = 256M) where x in [0, 31]
and TSB is set similarly:
VA + (4M * x) -> PA + (4M * x) (sz bit = 256M) where x in [0, 63]
- Testing
Tested on Sonoma (which supports 256M pages) by running stream
benchmark instances in parallel: one instance uses 8M pages and
another uses 256M pages, consuming 48G each.
Boot params used:
default_hugepagesz=256M hugepagesz=256M hugepages=300 hugepagesz=8M
hugepages=10000
Signed-off-by: Nitin Gupta <nitin.m.gupta@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/include/asm/page_64.h')
| -rw-r--r-- | arch/sparc/include/asm/page_64.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/sparc/include/asm/page_64.h b/arch/sparc/include/asm/page_64.h index c1263fc390db..d76f38d4171b 100644 --- a/arch/sparc/include/asm/page_64.h +++ b/arch/sparc/include/asm/page_64.h @@ -17,7 +17,7 @@ #define HPAGE_SHIFT 23 #define REAL_HPAGE_SHIFT 22 - +#define HPAGE_256MB_SHIFT 28 #define REAL_HPAGE_SIZE (_AC(1,UL) << REAL_HPAGE_SHIFT) #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) @@ -26,6 +26,7 @@ #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA #define REAL_HPAGE_PER_HPAGE (_AC(1,UL) << (HPAGE_SHIFT - REAL_HPAGE_SHIFT)) +#define HUGE_MAX_HSTATE 2 #endif #ifndef __ASSEMBLY__ |